BURLINGTON - Lawyers for the deputy Burlington police chief charged with drunken driving say the Vermont State Police created a "bounty" system with a financial incentive for troopers to make unlawful traffic stops.

A court filing from Andi Higbee's lawyers says troopers on DUI patrols were told that they would lose an opportunity to get overtime pay if they failed to make arrests during a summer campaign.

Higbee, who was off-duty at the time, says there was no reason to pull him over on July 21 in Sheldon and insufficient evidence to seek a breath test.

Senior Trooper Jay Riggen said that no trooper was paid more for making DUI arrests that night. He said the DUI enforcement grants allow police to focus on impaired drivers.